Finding the Fourth Proportional to 8,626.52, 12,921.86 and 5,491.01

Step by Step Solution

1. Step 1: Write the proportion equation
   8,626.52 : 12,921.86 = 5,491.01 : x
2. Step 2: Convert to fraction form
   8,626.52/12,921.86 = 5,491.01/x
3. Step 3: Cross multiply
   8,626.52x = 12,921.86 × 5,491.01
4. Step 4: Simplify right side
   8,626.52x = 70,954,062.48
5. Step 5: Solve for x
   x = 70,954,062.48/8,626.52
6. Step 6: Final answer
   x = 8,225.11